Questions about CURL uploading above php5.5 (WeChat “errcode”: 41005,”errmsg”,)
The method given by WeChat is @+ file path to assign an array to upload $data = array( ‘file’ => ‘@/PATH/TO/FILE’, //….other field); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); Here comes the problem, this @ can only be used in versions below 5.5, but it will be invalid in versions above 5.5 and 5.5, must Use the CURLFile class to upload: $data = array( ‘file’ => new CURLFile(‘/PATH/TO/FILE’), //….other fields); curl_setopt($ch , CURLOPT_POSTFIELDS, $data); But it is found that a small number of servers do not support the direct new CURLFile class, so when this happens, we can curl_file_create to create a CURLFile object (this function is the function Alias: CURLFile::__construct() ) $data = array( ‘file’ => curl_file_create(‘/PATH/TO/FILE’), //.. ..other fields); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); That’s it.
Common PHP algorithms [bubble sort, quick sort, insertion sort, trade-off sort, binary search,.]
Back-end development | php tutorial arr,array,start,return,count backend Development-php tutorial PHP common algorithm [bubble sort, quick sort, insertion sort, selection sort, binary search, ..] Simple blog source code, ubuntu user logout record, how tomcat allows others to visit, crawler positioning iframe, php technology sharing Ppt outsourcing, seo ranking all choose Leyun seolzw // bubble sort function bubblesort($arr) { for($i=0,$j=count($arr); $i$i; $k– ) { if ($arr[$k] <$arr[$k-1]) list($arr[$k-1], $arr[$k]) = array($arr[$k], $arr [$k-1]); } } return $arr;}$arr = array(1,4,14,3,56,23,435,2,234,2,33,23,123);print_r(bubblesort($arr)); // Quick sort function quicksort($arr) { if(($count = count($arr)) <= 1 ) return $arr; $base = $arr[0]; $left = $right = array(); for($i=1; $i<$count; $i++) { if($arr[$i] <= $base) $left[] = $arr[$i]; else $right[] = $arr[$i]; } $left = quicksort($left); $right = quicksort($right); return array_merge($left, array($base), $right);}echo join (',', quicksort(array(1,3,23,5,234,65,6)));? // Insert sort function insertsort($arr) { for ($i=1, $j=count($arr); $i 0 && $arr[$k-1] > $arr[$k]) { list($arr[$k], $arr[$k] -1]) = array($arr[$k-1], $arr[$k]); $k–; } } return $arr;}$array=array(10,8,7,5,1 ,2,3,4);print_r(insertsort($array)); ? Taxi source code php, vscode comment and uncomment, ubuntu installation guide, tomcat setting request header, crawler software film and television, php yun , operated by junior seo engineers, website built by wordpress, full version of web page template lzw // selection sort, (non-recursive) function…
PHP language bit operators, |, ^, ~, <>
PHP language bitwise operators &, |, ^, ~, <> “&” bitwise” and “operatingBitwise AND operator “&” is Binary operator. Its function is the binary phase AND of the two numbers involved in the operation. Only when the corresponding two binary bits are 1, the ， result bit is 1， otherwise, it is 0. The numbers involved in the operation appear in complement form. For example, ：9&5 can be written as follows ： 00001001 (two’s complement of 9) &00000101 (two’s complement of 5 ) 00000001 (two’s complement of 1) <?php$a = 9;$b = 5; echo sprintf(“%b”, $a&$b);?> “|”Bitwise OR” operationBitwise OR operator” |” is a binary operator. Its function is the binary phase OR corresponding to the two numbers involved in the operation. As long as one of the corresponding two binary bits is 1, the ， result bit is 1. Both numbers involved in the operation appear in two’s complement. For example, ：9|5 can be written as follows ： 00001001 |00000101 00001101 (decimal for 13) see 9|5=13 <?php$a =9;$b =5;echo sprintf(“%b”, $a|$b).”\n”; //binaryecho sprintf(“%d”, $a|$b).”\n”; //decimal “^” Bitwise XOR operation The bitwise XOR operator “^” is a binary operator. Its function is that the binary numbers corresponding to the two…
Problems caused by special characters in URLs in PHP (+,\,=)
Problems caused by special characters in URLs in PHP (+,,=) Preface ， in the process of doing a certain channel， found a signature verification error question. But ，at that time, the signature verification was inconsistent in two places，same set of processing methods，I thought that this is because the request methods in the two places are different, one is get method and the other is naturally post method. Of course, the problem must be get. GET and POST GET request method ，Because the parameters are placed in the URL，so it may be browsed when passing Some policy issues on the server side ， urlencode the parameters. So ， When you get the parameters on the server side, it may not be the original data. Therefore, ，requesting to obtain data through GET ，if you do not do any processing, there may be problems in verifying the signature. The possibility here is that when the base64 processing does not contain the special character “#xff0c;” and does not do any processing after the GET method, you will get a blank string. POST request method ， is to put parameters in the request body ， In the process of HTTP transmission, there will be no…
PHP A group of monkeys are arranged in a circle, numbered sequentially according to 1, 2, …, n.
1. A group of monkeys line up in a circle ， according to 1，2，…，n numbered in turn. Then start counting from the 1st ， count to the mth one, kick it out of the circle ， start counting from behind it， count to the mth one， and kick it Go out…，go on and on， Until there is only one monkey left at the end，that monkey is called the king. Programming is required to simulate this process ， input m, n, and output the number of the last king. function fn($n ,$m) { $arr = range(1,$n); $i = 0 ; //Set the array pointer while(count($arr)>1) { //traverse the array ， determine whether the current monkey is the serial number ， if yes, exit ， otherwise put To the end of the array if(($i+1) % $m ==0) { unset($arr[$i]); } else { //array_push() function adds one or more elements to the end of the array of the first parameter （ onto the stack）， and then returns the length of the new array. Array_push($arr, $arr[$i]); //The non-out monkeys of this round put the tail of the array unset($arr[$i]); //Delete The array_push function just copies the elements One moved…
Summary of PHP: empty,isset,is_null,array(0),array(),array(“”),0,”0″,””,”null”,NULL
Use the following program to detect $a=0; if(empty($a)){ echo “yes|”; }else{ echo “no|”; } if(isset($a)){ echo “yes|”; }else{ echo “no|”; } if(is_null($a)){ echo “yes|”; }else{ echo “no|”; } if ($a){ echo “yes|”; } else { echo “no|”; } Then when $a takes different values, the results are as follows Summary: empty case 1 variable value is empty $var = “”; 2 The value of the variable is the string 0 or the number 0 $var = 0 ; or $var = “0” 3 The value of the variable is flase $var= flase; 4 Anything that is NULL is empty 5 empty array $arr =array(); 6 Variables are only defined and not assigned $var; The Case of Isset Check if a variable has been set and is not empty (Determine if a variable is set and is not NULL) is_null Judging null Judging whether it is false 1 variable value is empty $var = “”; 2 The value of the variable is the string 0 or the number 0 $var = 0 ; or $var = “0” 3 The value of the variable is flase $var= flase; 4 Anything that is NULL is empty 5 empty array $arr =array(); 6 Variables…
The meaning of $ in php, the novice must read the meaning of =, ::, $this in PHP
Many newbies don’t understand the meaning of ->，=>，::，$this-> in PHP， Today we will discuss this issue One, -> is used to refer to the attributes (variables) and methods (functions) of a class You can understand -> as the meaning of calling Class a{ Var $id; Function add(){ $this->id=”test”; echo “abc”; } } $b = new a; $b->add (); //call the add() method in class a ， the output is abc Echo $b->id; //call the attribute id in class a ， the output is test ?> Second, =>is $arr1 used to define arrays =array(0=>'php' ;,1=>'is',the=>'the'); Echo $arra[0],$arr1[1] ,$arr[‘the’]; //The value of the corresponding output setting 3. ：： is used to directly call the properties or methods in the class， without instantiation In normal circumstances, we use the instantiation method to call the properties or methods in the class，but using：：you can call directly without instantiating the object， Can. For example ： Class b{ Var $name=”test”; Function Getname() { Echo 'test is good'; } } //Direct call ： ; Echo b::Getname();//The output is test isgood Fourth, $this->indicates calling a specific object after instantiation Class a{ Var $name; Function Getname(){ Echo $this->name; } } $name1 = new a; $name1->name = 'Assign to name1'; $name1->name…
?., ??, ?:, and ? in C# Use of other symbols
?., ??, ?:, and ? in C# Equal symbol usage ?., ??, ?:, and ? in C# Use of other symbols 1. Nullable type modifier (?) As we all know, a reference type in C# can use a null reference to represent a value that does not exist, such as string str = null is correct; But the value type cannot be empty, such as int k = null, then the compiler will report an error; In order to make the value type can also be empty, you need to use a nullable type, that is, use the nullable type modifier “?” to represent, for example: int? represents a nullable integer, and DateTime? represents a nullable time. This way we can write int? k = null without reporting an error. Its expression is “T?”, T? is actually the abbreviation of System.Nullable (generic structure), That means when you use T? When the compiler compiles, it will put T? Compiled into the form of System.Nullable. For example: int?, compiled in the form of System.Nullable. 2.NULL check operator (?.) ?. can be used as a check operator for NULL. Let’s take an example: Now to get the X value of a certain point,…
The ‘Access-Control-Allow-Origin‘ header contains multiple values‘*, *‘, but only one is allowed._Mr_Eiffel’s Blog
class=”markdown_views prism-atom-one-dark”> https://blog.csdn.net/iechenyb/article/details/84753613 Using Ajax cross-domain request resources, Nginx as a proxy, appears: The ‘Access-Control-Allow-Origin’ header contains multiple values ‘*, *’, but only one is allowed Error. The server allows cross-domain configuration: #region setting allows cross-domain and complex requests HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Origin”, “*”); if (HttpContext.Current.Request.HttpMethod == “OPTIONS “) { HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Methods”, “GET,POST,PUT,DELETE,PATCH,OPTIONS”); HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Headers”, “Content-Type, Accept, Authorization”); //HttpContext.Current.Response.AddHeader(“Access-Control-Max-Age”, “1728000”); HttpContext.Current.Response.End(); } #endregion Nginx configuration: add_header ‘Access-Control-Allow-Origin’ ‘*’; location / { if ($request_method = ‘OPTIONS’) { add_header Access-Control-Allow-Origin *; add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,PATCH,OPTIONS; return 200; } proxy_pass http://xx:8002/; #proxy_pass http://localhost:62249/; } Look at the above error message, contains multiple values ”*” means that 2 cross domains are set, but only one is allowed, just remove any one of them. If the server is set to allow cross-domain, it is not necessary to use Nginx proxy (or you do not need to use Nginx) https://blog.csdn.net/xxwd12/article/details/98882461 *1, Failed to load http://xx.com/mobile/service: The ‘Access-Control- Allow-Origin’ header contains multiple values ’*, ‘, but only one is allowed. Origin ‘http://localhost:8081’ is therefore not allowed access. Solution: This problem may be caused by the configuration of cross-domain options on the server side, and cross-domain settings are also specified on the code side, resulting in conflicts. Just remove the configuration on one side…
Take you to understand the difference between [], {}, () in js (detailed explanation)
One, { } curly brackets, which means to define an object, in most cases, there must be a pair of attributes and values, or a function body {} represents the object, [] represents the properties and methods of the object, if () is used after the method name, it represents the call For example: var LangShen = {“Name”:”Langshen”,”AGE”:”28″}; The above declares an object named “LangShen”, multiple attributes or functions are used, ( Comma) separated, because it is the property of the object, So when accessing, you should use . (dot) to access layer by layer: LangShen.Name, LangShen.AGE, Of course we It can also be accessed in the form of an array, such as: LangShen[“Name”], LangShen[“AGE”], the result is the same. var LangShen = { Name : function(){ return “Lang Shen”; }, Age : function(){ return “28”; } } Call LangShen.Name() Second, [ ] square brackets represent an array, which can also be understood as an array object For example: var LangShen = [ “Name”,”LangShen”,”AGE”,”28″ ]; Obviously, each value or function is independent, Multiple values are only separated by , (comma), because it is an array object, so it is equal to: var LangShen = Array( “Name”, “LangShen”,”AGE”,”28″ ); When accessing,…
